giúp mình với ah …….

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giúp mình với ah …….
giup-minh-voi-ah

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Neala 4 years 2020-10-13T16:16:23+00:00 2 Answers 90 views 0

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  1. Orla
    0
    2020-10-13T16:17:28+00:00
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    $\begin{array}{l}a)\, 4x^2 + 2x\\=2x(2x + 1)\\b)\, 3x^2(x + y) + x(x + y)\\=x(x + y)(3x +1)\\c)\, x^2 – x\\=x(x -1)\\d)\,5x^2(x – 2y) + 15x(2y – x)\\=x.5x(x – 2y) – 3.5x(x – 2y)\\=5x(x – 2y)(x – 3)\\e)\,3(x – y) – 5x(y – x)\\=3(x – y) + 5x(x – y)\\=(x – y)(3 + 5x)\\f)\, 10x(x – y) – 8y(x – y)\\=2(x – y)(5x – 4y)\\g)\, x^2y – xy\\=xy(x -1)\\h)\,xyz – 3x^2yz\\=xyz(1 – 3x)\\i)\,2(x -1) – 3y(x -1)\\=(x-1)(2 – 3y)\\j)\, 3(x -2) – 2y(2 – x)\\= (x – 2)(3 + 2y)\end{array}$

  2. Verity
    0
    2020-10-13T16:17:29+00:00
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    Đáp án:

     

    Giải thích các bước giải:

    a/=2x(2x+1)

    b/=(3x^2+x)(x+y)

    c/x(x-1)

    d/=(5x^2-15x)(x-2y)

       =5x(x-3)(x-2y)

    e/=(3+5x)(x-y)

    f/=(10x-8y)(x-y)

      =2(5x-4y)(x-y)

    g/=xy(x-1)

    h/=xyz(1-3x)

    i/=(2-3y)(x-1)

    j/=(3+2y)(x-2)

     

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